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6#include <linux/pci.h>
7#include <linux/irq.h>
8#include <linux/msi.h>
9#include <linux/dmar.h>
10#include <asm/smp.h>
11#include <asm/msidef.h>
12
13static struct irq_chip ia64_msi_chip;
14
15#ifdef CONFIG_SMP
16static int ia64_set_msi_irq_affinity(struct irq_data *idata,
17 const cpumask_t *cpu_mask, bool force)
18{
19 struct msi_msg msg;
20 u32 addr, data;
21 int cpu = cpumask_first_and(cpu_mask, cpu_online_mask);
22 unsigned int irq = idata->irq;
23
24 if (irq_prepare_move(irq, cpu))
25 return -1;
26
27 __get_cached_msi_msg(irq_data_get_msi_desc(idata), &msg);
28
29 addr = msg.address_lo;
30 addr &= MSI_ADDR_DEST_ID_MASK;
31 addr |= MSI_ADDR_DEST_ID_CPU(cpu_physical_id(cpu));
32 msg.address_lo = addr;
33
34 data = msg.data;
35 data &= MSI_DATA_VECTOR_MASK;
36 data |= MSI_DATA_VECTOR(irq_to_vector(irq));
37 msg.data = data;
38
39 pci_write_msi_msg(irq, &msg);
40 cpumask_copy(irq_data_get_affinity_mask(idata), cpumask_of(cpu));
41
42 return 0;
43}
44#endif
45
46int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc)
47{
48 struct msi_msg msg;
49 unsigned long dest_phys_id;
50 int irq, vector;
51
52 irq = create_irq();
53 if (irq < 0)
54 return irq;
55
56 irq_set_msi_desc(irq, desc);
57 dest_phys_id = cpu_physical_id(cpumask_any_and(&(irq_to_domain(irq)),
58 cpu_online_mask));
59 vector = irq_to_vector(irq);
60
61 msg.address_hi = 0;
62 msg.address_lo =
63 MSI_ADDR_HEADER |
64 MSI_ADDR_DEST_MODE_PHYS |
65 MSI_ADDR_REDIRECTION_CPU |
66 MSI_ADDR_DEST_ID_CPU(dest_phys_id);
67
68 msg.data =
69 MSI_DATA_TRIGGER_EDGE |
70 MSI_DATA_LEVEL_ASSERT |
71 MSI_DATA_DELIVERY_FIXED |
72 MSI_DATA_VECTOR(vector);
73
74 pci_write_msi_msg(irq, &msg);
75 irq_set_chip_and_handler(irq, &ia64_msi_chip, handle_edge_irq);
76
77 return 0;
78}
79
80void arch_teardown_msi_irq(unsigned int irq)
81{
82 destroy_irq(irq);
83}
84
85static void ia64_ack_msi_irq(struct irq_data *data)
86{
87 irq_complete_move(data->irq);
88 irq_move_irq(data);
89 ia64_eoi();
90}
91
92static int ia64_msi_retrigger_irq(struct irq_data *data)
93{
94 unsigned int vector = irq_to_vector(data->irq);
95 ia64_resend_irq(vector);
96
97 return 1;
98}
99
100
101
102
103static struct irq_chip ia64_msi_chip = {
104 .name = "PCI-MSI",
105 .irq_mask = pci_msi_mask_irq,
106 .irq_unmask = pci_msi_unmask_irq,
107 .irq_ack = ia64_ack_msi_irq,
108#ifdef CONFIG_SMP
109 .irq_set_affinity = ia64_set_msi_irq_affinity,
110#endif
111 .irq_retrigger = ia64_msi_retrigger_irq,
112};
113
114#ifdef CONFIG_INTEL_IOMMU
115#ifdef CONFIG_SMP
116static int dmar_msi_set_affinity(struct irq_data *data,
117 const struct cpumask *mask, bool force)
118{
119 unsigned int irq = data->irq;
120 struct irq_cfg *cfg = irq_cfg + irq;
121 struct msi_msg msg;
122 int cpu = cpumask_first_and(mask, cpu_online_mask);
123
124 if (irq_prepare_move(irq, cpu))
125 return -1;
126
127 dmar_msi_read(irq, &msg);
128
129 msg.data &= ~MSI_DATA_VECTOR_MASK;
130 msg.data |= MSI_DATA_VECTOR(cfg->vector);
131 msg.address_lo &= ~MSI_ADDR_DEST_ID_MASK;
132 msg.address_lo |= MSI_ADDR_DEST_ID_CPU(cpu_physical_id(cpu));
133
134 dmar_msi_write(irq, &msg);
135 cpumask_copy(irq_data_get_affinity_mask(data), mask);
136
137 return 0;
138}
139#endif
140
141static struct irq_chip dmar_msi_type = {
142 .name = "DMAR_MSI",
143 .irq_unmask = dmar_msi_unmask,
144 .irq_mask = dmar_msi_mask,
145 .irq_ack = ia64_ack_msi_irq,
146#ifdef CONFIG_SMP
147 .irq_set_affinity = dmar_msi_set_affinity,
148#endif
149 .irq_retrigger = ia64_msi_retrigger_irq,
150};
151
152static void
153msi_compose_msg(struct pci_dev *pdev, unsigned int irq, struct msi_msg *msg)
154{
155 struct irq_cfg *cfg = irq_cfg + irq;
156 unsigned dest;
157
158 dest = cpu_physical_id(cpumask_first_and(&(irq_to_domain(irq)),
159 cpu_online_mask));
160
161 msg->address_hi = 0;
162 msg->address_lo =
163 MSI_ADDR_HEADER |
164 MSI_ADDR_DEST_MODE_PHYS |
165 MSI_ADDR_REDIRECTION_CPU |
166 MSI_ADDR_DEST_ID_CPU(dest);
167
168 msg->data =
169 MSI_DATA_TRIGGER_EDGE |
170 MSI_DATA_LEVEL_ASSERT |
171 MSI_DATA_DELIVERY_FIXED |
172 MSI_DATA_VECTOR(cfg->vector);
173}
174
175int dmar_alloc_hwirq(int id, int node, void *arg)
176{
177 int irq;
178 struct msi_msg msg;
179
180 irq = create_irq();
181 if (irq > 0) {
182 irq_set_handler_data(irq, arg);
183 irq_set_chip_and_handler_name(irq, &dmar_msi_type,
184 handle_edge_irq, "edge");
185 msi_compose_msg(NULL, irq, &msg);
186 dmar_msi_write(irq, &msg);
187 }
188
189 return irq;
190}
191
192void dmar_free_hwirq(int irq)
193{
194 irq_set_handler_data(irq, NULL);
195 destroy_irq(irq);
196}
197#endif
198
199
